/Engine/Plugins/Online/OnlineFramework/Source/Party/Public/Interactions/SocialInteractionHandle.h
Represents a single discrete interaction between a local player and another user. Useful for when you'd like to create some tangible list of interactions to compare/sort/classify/iterate. Not explicitly required if you have a particular known interaction in mind - feel free to access the static API of a given interaction directly.
class FSocialInteractionHandle